Question

A constant force is applied to an object, causing the object to accelerate at 10 m/s^2. What will the acceleration be if the force is halved and the object's mass is doubled?

Answer 1

As the force is constant , neglecting the change in masses, we can use,
F= ma ( where F is the force acting on a body, m the mass and a is the acc. )
So, from here, use a= F/m, simply substitute the values...